diff --git a/.github/workflows/svf-teaching.yml b/.github/workflows/svf-teaching.yml
index 8a93911..a406ae4 100644
--- a/.github/workflows/svf-teaching.yml
+++ b/.github/workflows/svf-teaching.yml
@@ -30,8 +30,6 @@ jobs:
       - name: ubuntu-setup
         if: runner.os == 'Linux'
         run: |
-          sudo apt-get update
-          sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
           sudo apt-get update
           sudo apt-get install cmake gcc g++ nodejs doxygen graphviz